JP2005071809A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly ground a ballast outer shell and a luminaire body. <P>SOLUTION: This luminaire has: the luminaire body; a rod-shaped ballast 1 having the outer shell formed of an electroconductor; a tube-like case disposed in the luminaire body storing the ballast 1; gaskets abutting on both ends of the case; and end plates each installed to the case in a pressing state to the gasket formed of an electroconductor. A metal fitting 10 for establish conduction is inserted between the ballast outer shell and a case inner wall to electroconduct the ballast outer shell and the end plate through the case. Thereby, because the grounding conduction between the ballast outer shell and the luminaire body is certainly established, not only grounding certainty with electric safety as a purpose but also so-called functional grounding with the reduction of noise generated from an inverter as a purpose can be more certainly obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lighting fixture.

  In recent years, inverter products have been rapidly expanding for the purpose of energy saving. In the case of inverter products, not only grounding reliability for the purpose of electrical safety but also so-called functional grounding for the purpose of reducing noise generated from the inverter is required. Conventionally, the continuity between the outer case of the waterproof case and the luminaire main body has been ensured, but the actual situation is that no measures are taken for the continuity between the outer case of the inverter ballast and the waterproof case.

  FIG. 10 is an exploded perspective view around a ballast of a conventional lighting fixture, and FIG. 11 is an explanatory view of another conventional lighting fixture. As shown in FIG. 10, there is a method in which the ballast 1 is housed in the cylindrical case 2, and the packing 3 is pressed by the end plate 4 at both ends and attached with the screws 5. However, the case 2 and the outer shell of the ballast are often subjected to surface treatment, and conduction between them is not reliable. As such a configuration, a waterproof case for electric parts (Patent Document 1) including a case main body, a waterproof packing attached to the opening of the case main body, and an end cover attached to the waterproof packing, or an end of the case main body. An electrical component storage case (Patent Document 2) in which packing and end plates are fastened and fixed is disclosed.

  In addition, there is no consideration for rattling and positioning of the ballast 1 in the case 2, and there are variations among individuals such as the reliability of grounding and the heat dissipation effect due to the ballast 1 being in close contact with the inner wall of the case 2. There were many. Furthermore, when the end plate 4 is fastened to the case 2 with the screws 5, the compression allowance of the packing 3 varies depending on the tightening force.

In addition, as shown in FIG. 11, there is a method in which the ballast 1 is housed in the case 2 and both ends thereof are sealed with a compound 55 or the like. This method has no problem in terms of waterproof performance, but has a problem in the grounding reliability described above. Further, there is a problem that it takes time to dry the compound 55.
Japanese Utility Model Publication No. 5-38962 JP-A-5-291759

  As described above, many of the conventional examples often do not consider the certainty of the ground. At the same time, there were many variations among individuals, such as the heat dissipation effect due to the ballast closely contacting the inner wall of the case.

  Accordingly, an object of the present invention is to provide a lighting device that can reliably ground the ballast to the device body when the ballast used in a general device is housed in a cylindrical case. That is.

  In order to solve the above-mentioned problems, a lighting apparatus according to claim 1 of the present invention includes an apparatus main body, a rod-shaped ballast whose outer shell is formed of a conductor, and a cylinder that is disposed on the apparatus main body and houses the ballast. The ballast shell and the end plate in a lighting fixture comprising a case, a packing abutting against both ends of the case, and an end plate formed of a conductor that presses the packing and is attached to the case Are conducted through the case.

  The lighting fixture according to claim 2 of the present invention is the lighting fixture according to claim 1, wherein a metal fitting for establishing conduction is inserted between the outer shell of the ballast and the inner wall of the case.

  According to a third aspect of the present invention, in the lighting device according to the first aspect, the ballast shell is provided with a protrusion that contacts the inner wall of the case.

  According to the lighting apparatus of the first aspect of the present invention, since the ballast shell and the end plate are electrically connected via the case, grounding conduction between the ballast shell and the tool body can be ensured. For this reason, not only the grounding reliability for the purpose of electrical safety but also so-called functional grounding for the purpose of reducing noise generated from the inverter can be realized more reliably.

  According to the second aspect of the present invention, since the metal fitting for establishing conduction is inserted between the outer shell of the ballast and the inner wall of the case, the conduction between the ballast and the case becomes possible. In addition, the bracket can prevent the ballast of the ballast and can be grounded at the same time as the ballast is mounted.

  According to the third aspect of the present invention, since the projection that contacts the inner wall of the case is provided on the outer shell of the ballast, conduction between the ballast and the case becomes possible. In addition, the ballast can be prevented from rattling by the protrusion, and the grounding can be taken simultaneously with the mounting of the ballast, and there is an advantage that metal fittings, screws and the like are unnecessary.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a ballast according to a first embodiment of the present invention, FIG. 2A is an exploded perspective view of the entire waterproof lighting fixture, and FIG. 1B is an explanatory view of a completed state of the waterproof ballast.

  As shown in FIG. 1 and FIG. 2, an instrument main body 20, a rod-shaped ballast 1 whose outer shell is formed of a conductor, a cylindrical case 2 that is disposed on the instrument main body 20 and houses the ballast 1, and a case 2, a packing 3 abutting on both ends, and an end plate 4 formed of a conductor that is attached to the case 2 by pressing the packing 3. The configuration is the same as that of the conventional example shown in FIG. The ballast shell and the end plate 4 are electrically connected via the case 2. Specifically, a metal fitting 10 was inserted between the ballast shell and the inner wall of the case 2 for electrical conduction.

  The metal fitting 10 is formed of a conductor and includes a protrusion 10a and a screw insertion hole 10b for the purpose of cutting the surface treatment film on the inner wall of the case 2, and is attached to the ballast 1 with a screw 17, a nut 18, and the like. Further, a screw insertion portion 15 is provided at an end portion of the ballast outer shell. In this case, the screw 17 is inserted through the screw insertion hole 10b of the metal fitting 10 and the screw insertion portion 15 of the ballast 1 and the nut 10 is used to fix the metal fitting 10 to the upper surface of the ballast shell. Since the nut 18 is provided with a protrusion (not shown) for scraping the surface treatment film on the outer surface of the ballast, conduction between the ballast 1 and the case 2 becomes possible.

  Further, as shown in FIG. 2B, the end plate 4 is provided with a mounting piece 11 and a screw mounting portion 14. Since the case 2 and the end plate 4 are attached with the screw 5 using the screw attachment portion 14, the conduction between the ballast 1 and the end plate 4 is possible. Furthermore, since the end plate 4 is attached to the instrument main body 20 by using a screw / nut 25 or the like using a hole provided in the attachment piece 11, ground conduction between the ballast outer shell and the instrument main body 20 is possible.

  Further, as shown in FIG. 2A, the instrument body 20 is fixed to an anchor bolt with a washer / nut 21, and a reflector 22 and a lamp 23 are mounted thereon. Further, the electric wire 26 from the ballast 1 is led out from the electric wire insertion hole 13 provided in the packing 3 and the end plate 4 (FIG. 2B).

  As described above, according to the present embodiment, it is possible to ensure ground conduction between the ballast shell and the instrument body 20. For this reason, not only the grounding reliability for the purpose of electrical safety but also so-called functional grounding for the purpose of reducing noise generated from the inverter can be realized more reliably. Further, the metal fitting 10 can prevent the ballast 1 from rattling and can be grounded at the same time as the ballast 1 is attached.

  A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a perspective view of a ballast according to a second embodiment of the present invention.

  As shown in FIG. 3, as in the first embodiment, a metal fitting 10 is inserted between the outer shell of the ballast and the inner wall of the case 2 for electrical conduction. This metal fitting 10 is provided with protrusions 10a on both sides. By cutting the ballast shell and the surface treatment film on the inner wall of the case 2 with the protrusion 10a, conduction between the ballast 1 and the case 2 can be obtained. In the present embodiment, there is an advantage that conduction is possible without a fixing tool such as a screw. Other structural effects are the same as those of the first embodiment.

  A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of an essential part of the third embodiment of the present invention.

  As shown in FIG. 4, in the first embodiment, the case 2 is provided with a space for avoiding a screw head or the like protruding to the back side of the ballast 1. In this case, the case 2 is provided with a recess 35 into which the head of the screw 17 used when the metal fitting 10 (not shown in FIG. 4) is attached to the ballast 1 is inserted. Thereby, the ballast 1 can be brought into close contact with the case 2. In the present embodiment, the ballast 1 is positioned with respect to the case 2 by the recess 35, and the heat dissipation effect can be improved by bringing the ballast 1 into contact with the inner wall of the case 2. The metal fitting 10 may be inserted into the recess 35 together with the head of the screw 17.

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 5A is a perspective view of a ballast according to a fourth embodiment of the present invention, and FIG.

  As shown in FIG. 5, in the first embodiment, an elastic body is inserted between the ballast 1 and the inner wall of the case 2 instead of the metal fitting 10. In this case, a plate-like spring 36 is inserted between the ballast 1 and the case 2 so that the ballast 1 is in close contact with the case 2. At this time, a convex portion 37 into which the spring 36 is fitted is provided on the inner surface of the case 2 to facilitate positioning of the spring 36. Moreover, the recessed part 35 is provided in the case 2 similarly to 3rd Embodiment. In the present embodiment, the ballast 1 is more closely attached to the inner wall of the case 2 to prevent rattling of the ballast 1 in the case 2 and to improve the heat dissipation effect. Further, the spring 36 can be more reliably positioned by the convex portion 37.

  A fifth embodiment of the present invention will be described with reference to FIG. FIG. 6A is a perspective view of a ballast according to the fifth embodiment of the present invention, and FIG. 6B is a perspective view of another example of the ballast according to the fifth embodiment.

  As shown in FIG. 6, in 1st Embodiment, it is the structure which provided the protrusion in the back surface or side surface of the ballast 1 instead of the metal fitting 10, and enabled conduction | electrical_connection between the ballast 1 and the case 2. As shown in FIG. That is, as shown in FIG. 6A, the projections 30 are provided by cutting and raising both end portions of the back surface of the ballast shell. Moreover, as shown in FIG.6 (b), the both ends of the side surface of a ballast outline are cut and raised, and the protrusion 30 is provided. The protrusion 30 can scrape the surface treatment film on the inner wall of the case 2, and can ensure electrical connection between the ballast 1 and the case 2. In the present embodiment, there is an advantage that the ballast of the ballast 1 can be prevented and metal fittings and screws are unnecessary.

  A sixth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view of a ballast according to a sixth embodiment of the present invention.

  As shown in FIG. 7, in 1st Embodiment, it is the structure which protruded with the screw | thread etc. on the back side of the ballast 1 instead of the metal fitting 10. As shown in FIG. In this case, a screw hole 31 is provided at the back end of the ballast shell, and a screw 32 is screwed into the screw hole 31 to project the screw tip. The tip of the screw 32 can scrape the surface treatment film on the inner wall of the case 2, so that conduction between the ballast 1 and the case 2 can be ensured. In the present embodiment, since the screw 32 is provided at one end of the ballast 1 and the projection 30 similar to that of FIG. 6B is provided at the other end, the screw tightening operation is performed at one place. It's okay. Note that screws 32 may be provided at both ends of the ballast 1.

  A seventh embodiment of the present invention will be described with reference to FIG. FIG. 8 is a perspective view of an end plate according to a seventh embodiment of the present invention.

  As shown in FIG. 8, the end plate 4 is provided with a protrusion 38 that is in contact with the end of the case 2. The above-described embodiments can be used as a configuration for establishing conduction between the ballast 1 and the case 2. In this case, the protrusion 38 is located at the position of the screw attachment portion 14 through which the screw 5 is inserted, and is a portion where the screw attachment portion 14 protrudes inward (FIG. 2). The height of the protruding portion 38 is a height corresponding to an appropriate compression allowance of the packing 3, and the compression allowance of the packing 3 can be kept constant regardless of the force with which the screw 5 is tightened. In this embodiment, waterproof performance with reduced variation among individuals can be obtained.

  That is, conventionally, when the end plate is fastened to the case with a screw, the packing compression cost varies depending on the tightening force, and thus there is variation among individuals in terms of waterproof performance. Further, when both ends of the case are sealed with a compound (FIG. 11), there is a drawback that it takes time to dry the case, but such a problem is solved.

  An eighth embodiment of the present invention will be described with reference to FIG. FIG. 9A is a perspective view of an end plate according to an eighth embodiment of the present invention, and FIG.

  As shown in FIG. 9, in the seventh embodiment, even if the position of the screw mounting portion 14 deviates from the center of gravity, the protruding portion 39 is provided at a position where the entire packing 3 is uniformly compressed. That is, when the position of the screw 5 inserted through the screw mounting portion 14 is not at the center of gravity of the cross section of the case 2, it is difficult to press the entire packing 3 uniformly after the screw 5 is tightened. Therefore, by providing the protrusion 39 separately from the screw attachment portion 14, the entire packing 3 can be pressed down uniformly. The protrusions 39 are arranged so that the entire packing 3 can be pressed uniformly.

It is a perspective view of the ballast of the 1st embodiment of the present invention. (A) is a disassembled perspective view of the whole waterproof lighting fixture, (b) is explanatory drawing of the completion state of a waterproof ballast. It is a perspective view of the ballast of the 2nd embodiment of the present invention. It is principal part sectional drawing of the 3rd Embodiment of this invention. (A) is a perspective view of the ballast of a 4th embodiment of the present invention, and (b) is an important section sectional view. (A) is a perspective view of the ballast of the 5th embodiment of the present invention, and (b) is a perspective view of other examples of the ballast of the 5th embodiment. It is a perspective view of the ballast of the 6th embodiment of the present invention. It is a perspective view of the end plate of the 7th Embodiment of this invention. (A) is a perspective view of the end plate of the 8th Embodiment of this invention, (b) is principal part sectional drawing. It is a disassembled perspective view around the ballast of the conventional lighting fixture. It is explanatory drawing of the lighting fixture of another conventional example.

Explanation of symbols

1 Ballast 2 Case 3 Packing 4 End plate 10 Metal fitting 30 Projection

Claims (3)

  An instrument main body, a rod-shaped ballast whose outer shell is formed of a conductor, a cylindrical case disposed in the instrument main body to store the stabilizer, a packing abutting on both ends of the case, and a holder for holding the packing A lighting fixture comprising an end plate formed of a conductor attached to the case, wherein the ballast shell and the end plate are electrically connected through the case.   The lighting fixture according to claim 1, wherein a metal fitting for conducting is inserted between the outer shell of the ballast and the inner wall of the case.   The lighting fixture according to claim 1, wherein a protrusion that contacts the inner wall of the case is provided on the outer shell of the ballast.

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